def search4vowels(word: str)->set:
    '''search4vowels ： return vowels times and sorted'''    
    vowels = list('aeiou')
    found = dict()
    print(vowels)
    for letter in word:
        if letter in vowels:
            found.setdefault(letter, 0)
            found[letter] = found[letter] + 1
    sortedfound = {k: found[k] for k in sorted(found.keys())}
    return sortedfound
    

print(search4vowels("iiiaaaabbbboy"))

    